The end of menstruation in 9 days may be an abnormal performance caused by various pathogenic factors such as endocrine disorders, endometrial polyps, submucosal fibroids and so on. 1. Endocrine disorders: At the time of menstruation, if a woman has too much psychological stress and excessive emotional anxiety, it may cause endocrine disorders, which may cause prolongation of the menstrual period and may lead to the end of menstruation in 9 days. 2. Endometrial polyps: When endometrial polyps are present in female patients, irregular shedding of the endometrium during menstruation may cause menstruation to end in 9 days. 3. Submucosal fibroids: If a female patient has submucosal fibroids, it may cause prolonged menstrual period and increased menstrual blood volume during menstruation, which may lead to the end of menstruation in 9 days. Prolonged menstrual period, it is recommended to go to the hospital, under the guidance of the doctor, according to the cause of the disease, symptomatic treatment.